Sand-belt finishing machine having dust clearing function

ABSTRACT

A sand-belt finishing machine includes two opposite grinding devices arranged in parallel with each other and each including two opposite rollers and a sand belt reeved around the two rollers, and a dust clearing device mounted between the two grinding devices. Thus, the wooden board is placed on a single main frame and is processed by a single working procedure to synchronously obtain a double surface treatment, including the rough working treatment and the finishing treatment, thereby greatly simplifying the working process.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a sand-belt finishing machine having a dust clearing function, and more particularly to a sand-belt finishing machine that is processed by a single working procedure to synchronously obtain a double surface treatment, including the rough working treatment and the finishing treatment, thereby simplifying the working process.

2. Description of the Related Art

A conventional sand-belt finishing machine in accordance with the prior art shown in FIG. 1 comprises two rollers 12, a sand belt 14 reeved around the two rollers 12, and a dust clearing device including a hood 16 mounted outside of the two rollers 12 and the sand belt 14, and a suction member 18 mounted on the hood 16. Thus, the chips produced from the wooden board 50 during the grinding process can be introduced into the hood 16 by the suction effect of the suction member 18 and can then be drained outward.

However, the hood 16 of the dust clearing device is mounted outside of the two rollers 12 and the sand belt 14, thereby greatly increasing the whole volume of the conventional sand-belt finishing machine. In addition, the user needs to remove the hood 16 of the dust clearing device before replacing the sand belt 14, thereby causing inconvenience in replacement and maintenance. Further, the chips produced from the wooden board 50 are easily attached on the surface of the sand belt 14, thereby scratching the surface of the wooden board 50. Further, the sand belt 14 only has a single thickness, so that the user needs to replace the sand belts 14 of different thickness, thereby causing inconvenience in operation.

Another conventional sand-belt finishing machine in accordance with the prior art shown in FIG. 2 comprises three rollers 21, a sand belt 24 reeved around the three rollers 21, and a dust clearing device including a hood 26 mounted outside of the three rollers 21 and the sand belt 24, and a suction member 28 mounted on the hood 26. Thus, the chips produced from the wooden board 50 during the grinding process can be introduced into the hood 26 by the suction effect of the suction member 28 and can then be drained outward. However, the above-mentioned problems still exist.

SUMMARY OF THE INVENTION

The present invention is to mitigate and/or obviate the disadvantage of the conventional sand-belt finishing machine.

The primary objective of the present invention is to provide a sand-belt finishing machine, wherein the wooden board is placed on a single main frame and is processed by a single working procedure to synchronously obtain a double surface treatment, including the rough working treatment and the finishing treatment, thereby simplifying the working process.

Another objective of the present invention is to provide a sand-belt finishing machine, wherein the dust clearing device is mounted between the two grinding devices to shorten the whole volume of the sand-belt finishing machine, thereby facilitating storage, package and transportation.

A further objective of the present invention is to provide a sand-belt finishing machine, wherein the chips produced from the wooden board can be introduced into the hood of the dust clearing device easily and conveniently.

A further objective of the present invention is to provide a sand-belt finishing machine, wherein the chips produced from the wooden board can be introduced into the hood of the dust clearing device rapidly without being attached on the surfaces of the sand belts of the two grinding devices, thereby enhancing the working quality of the wooden board.

A further objective of the present invention is to provide a sand-belt finishing machine, wherein the dust clearing device is mounted between the two grinding devices, thereby facilitating replacement and maintenance of the sand belts of the two grinding devices.

In accordance with the present invention, there is provided a sand-belt finishing machine, comprising:

-   -   two opposite grinding devices arranged in parallel with each         other and each including two opposite rollers, and a sand belt         reeved around the two rollers.

Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan cross-sectional view of a conventional sand-belt finishing machine in accordance with the prior art;

FIG. 2 is a plan cross-sectional view of another conventional sand-belt finishing machine in accordance with the prior art;

FIG. 3 is a perspective view of a sand-belt finishing machine in accordance with the preferred embodiment of the present invention;

FIG. 4 is a schematic plan view of the sand-belt finishing machine in accordance with the preferred embodiment of the present invention; and

FIG. 5 is a schematic operational view of the sand-belt finishing machine as shown in FIG. 4 in use.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIGS. 3 and 4, a sand-belt finishing machine in accordance with the preferred embodiment of the present invention comprises a main frame 30 disposed at a horizontal state, an upright seat 32 mounted on and vertical to the main frame 30, and two grinding devices 34 and 35 mounted on two sides of the upright seat 32.

The grinding device 34 includes two rollers 342 and 344 each located beside the upright seat 32, and a sand belt 346 reeved around the two rollers 342 and 344. The two rollers 342 and 344 of the grinding device 34 are spaced from each other and are mounted on the upright seat 32 in a parallel manner.

The grinding device 35 includes two rollers 352 and 354 each located beside the upright seat 32, and a sand belt 356 reeved around the two rollers 352 and 354. The two rollers 352 and 354 of the grinding device 35 are spaced from each other and are mounted on the upright seat 32 in a parallel manner.

Preferably, the sand belt 346 of the grinding device 34 has a thickness different from that of the sand belt 356 of the grinding device 35.

The sand-belt finishing machine further comprises a driving device 36 mounted on the upright seat 32 and connected to the two grinding devices 34 and 35 for actuating the two grinding devices 34 and 35.

The sand-belt finishing machine further comprises a dust clearing device 38 mounted on the main frame 30. The dust clearing device 38 includes a hood 382 mounted between the two grinding devices 34 and 35, and a suction member 384 mounted on the hood 382.

Referring to FIG. 5, when in use, the wooden board 50 is conveyed to a space between the two grinding devices 34 and 35 and a delivery platform 60, and is in contact with the sand belts 346 and 356 of the two grinding devices 34 and 35. In practice, the sand belts 346 and 356 of the two grinding devices 34 and 35 have different thickness. For example, the sand belt 346 of the grinding device 34 has a thickness greater than that of the sand belt 356 of the grinding device 35.

Thus, the wooden board 50 is initially ground by the sand belt 346 of the grinding device 34 and is then ground by the sand belt 356 of the grinding device 35, so that the wooden board 50 has a better finished surface after passing through the two grinding devices 34 and 35.

It is appreciated that, the wooden board 50 is placed on a single main frame 30 and is processed by a single working procedure to obtain a double surface treatment, including the rough working treatment and the finishing treatment, by the two grinding devices 34 and 35.

In addition, the sand belts 346 and 356 of the two grinding devices 34 and 35 are in contact with the wooden board 50 during movement of the wooden board 50, so that the contact position between the sand belts 346 and 356 of the two grinding devices 34 and 35 and the wooden board 50 form a nearly closed state. In addition, the hood 382 of the dust clearing device 38 has a bottom slightly higher than the bottom of each of the sand belts 346 and 356 of the two grinding devices 34 and 35. Thus, a space is defined between the hood 382 of the dust clearing device 38 and the surface of the wooden board 50. Thus, the chips produced from the wooden board 50 can be introduced into the hood 382 of the dust clearing device 38 easily and conveniently by the suction effect of the suction member 384 of the dust clearing device 38, and can then be drained outward.

In addition, the dust clearing device 38 is mounted between the two grinding devices 34 and 35 so as to shorten the whole volume of the sand-belt finishing machine, thereby facilitating storage, package and transportation.

Further, the chips produced from the wooden board 50 can be introduced into the hood 382 of the dust clearing device 38 rapidly without being attached on the surfaces of the sand belts 346 and 356 of the two grinding devices 34 and 35, thereby enhancing the working quality of the wooden board 50.

Further, the dust clearing device 38 is mounted between the two grinding devices 34 and 35, thereby facilitating replacement and maintenance of the sand belts 346 and 356 of the two grinding devices 34 and 35.

Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention. 

1. A sand-belt finishing machine, comprising: two opposite grinding devices arranged in parallel with each other and each including two opposite rollers, and a sand belt reeved around the two rollers.
 2. The sand-belt finishing machine in accordance with claim 1, further comprising a dust clearing device mounted between the two grinding devices.
 3. The sand-belt finishing machine in accordance with claim 2, wherein the dust clearing device includes a hood mounted between the two grinding devices, and a suction member mounted on the hood.
 4. The sand-belt finishing machine in accordance with claim 1, further comprising a wooden board mounted between a space between the two grinding devices and a delivery platform and being in contact with the sand belts of the two grinding devices, so that the contact position between the sand belts of the two grinding devices and the wooden board form a closed state.
 5. The sand-belt finishing machine in accordance with claim 1, wherein the sand belts of the two grinding devices have different thickness.
 6. The sand-belt finishing machine in accordance with claim 1, wherein the two rollers of each of the two grinding devices are spaced from each other and are arranged in parallel with each other. 